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<!DOCTYPE html>
<html>
<?php
/**
 * The WP-CLI command.
 *
 * @package WP-Sweep
 */

defined( 'ABSPATH' ) || exit;

/**
 * Cleans up unused, orphaned and duplicated data from the command line.
 *
 * Registered as `wp sweep` rather than `wp wp-sweep`. A `wp-` prefix is a
 * wordpress.org directory convention for keeping one plugin's download page
 * apart from another's, not a command-naming one, and after the `wp` binary it
 * only stutters; WP-CLI's own ecosystem names commands after the brand -- `wp
 * wc`, `wp yoast`, `wp jetpack`. It is also the name the released 1.2.0
 * shipped, so no script that already calls WP-Sweep has to be edited. WP-CLI
 * gives a collision to whichever plugin registered last and a bare noun is
 * claimable by anyone; that is the accepted trade for a word as distinctive as
 * `sweep`.
 */
class WP_Sweep_Command extends WP_CLI_Command {

	/**
	 * Clean up unused, orphaned and duplicated data in your WordPress.
	 *
	 * ## OPTIONS
	 *
	 * [<name>...]
	 * : One or more items to sweep. Ignored when --all is given.
	 *
	 * [--all]
	 * : Sweep every item, in the order they have to run.
	 *
	 * ## AVAILABLE ITEMS
	 *
	 *  revisions, auto_drafts, deleted_posts, unapproved_comments,
	 *  spam_comments, deleted_comments, transient_options, orphan_postmeta,
	 *  orphan_commentmeta, orphan_usermeta, orphan_termmeta,
	 *  orphan_term_relationships, unused_terms, duplicated_postmeta,
	 *  duplicated_commentmeta, duplicated_usermeta, duplicated_termmeta,
	 *  optimize_database, oembed_postmeta
	 *
	 * ## EXAMPLES
	 *
	 *     # Sweep everything.
	 *     $ wp sweep --all
	 *
	 *     # Sweep one item.
	 *     $ wp sweep revisions
	 *
	 *     # Sweep several items.
	 *     $ wp sweep revisions auto_drafts deleted_posts
	 *
	 * @since 1.0.8
	 *
	 * @param array $args       Item names passed to the command.
	 * @param array $assoc_args Flags passed to the command.
	 * @return void
	 */
	public function __invoke( $args, $assoc_args ) {
		$sweeps = WP_Sweep::get_instance()->get_sweep_names();

		if ( ! empty( $assoc_args['all'] ) ) {
			$this->run_sweep( $sweeps );

			WP_CLI::success( __( 'Sweep Complete', 'wp-sweep' ) );

			return;
		}

		$requested = array_values( array_unique( (array) $args ) );

		/*
		 * Nothing named and no --all swept nothing and reported success, which is
		 * the same answer a real sweep gives.
		 */
		if ( empty( $requested ) ) {
			WP_CLI::error( __( 'Name at least one item to sweep, or pass --all to sweep every one.', 'wp-sweep' ) );
		}

		/*
		 * A name that is not a sweep is a typo, and it used to be discarded in
		 * silence: `wp sweep revisons` filtered down to nothing, swept nothing
		 * and printed "Sweep Complete!", so the only report of the mistake was
		 * that the revisions were still there. On a command whose whole job is
		 * deleting data, "I did what you asked" is the one thing it must not say
		 * when it did not.
		 *
		 * The screen's bulk handler drops unknown names on purpose and says
		 * nothing, because there the names come from checkboxes it rendered
		 * itself -- an unexpected one is tampering, not a typo, and it has no
		 * user to correct.
		 */
		$unknown = array_diff( $requested, $sweeps );

		if ( ! empty( $unknown ) ) {
			WP_CLI::error(
				sprintf(
					/* translators: %s is a comma-separated list of item names that were not recognised. */
					__( 'Not something this plugin sweeps: %s. Run `wp help sweep` for the list.', 'wp-sweep' ),
					implode( ', ', $unknown )
				)
			);
		}

		// Filtered from the canonical list rather than taken as given, so the
		// items run in the order they have to: posts are deleted before the
		// sweeps that hunt for the meta that deleting them just orphaned.
		$this->run_sweep( array_values( array_intersect( $sweeps, $requested ) ) );

		WP_CLI::success( __( 'Sweep Complete!', 'wp-sweep' ) );
	}

	/**
	 * Run each named sweep that has anything to remove.
	 *
	 * @since 1.0.8
	 *
	 * @param array $items Sweep names.
	 * @return void
	 */
	public function run_sweep( $items ) {
		$sweep = WP_Sweep::get_instance();

		foreach ( $items as $item ) {
			if ( 0 === (int) $sweep->count( $item ) ) {
				continue;
			}

			WP_CLI::success( $sweep->sweep( $item ) );
		}
	}
}